use the following code to get the data in the request header, but cannot get the value (the client also uses access_token)
access_token=request.header.get_all("access_token")use the following code to get the data in the request header, and you can get the value (the client also uses access-token)
access_token=request.header.get_all("access-token")does this require additional configuration?
 personally, I think it should be a configuration similar to nginx  underscores_in_headers , but no configuration similar to gunicorn was found. 
